
6 steps
wm9811wm9811
signature
22→42
rule

{{{1, 2}, {1, 3}} -> {{2, 4}, {2, 1}, {4, 1}, {4, 3}}}
{{{1, 2}, {1, 3}} -> {{2, 4}, {2, 1}, {4, 1}, {4, 3}}}